Display screen or portion thereof with a transitional graphical user interface



FIG. 1 is a front view of a display screen or portion thereof with atransitional graphical user interface, showing our new design,illustrating a first image thereof.

FIG. 2 is a front view of the display screen or portion thereof with thetransitional graphical user interface, illustrating a second imagethereof.

FIG. 3 is a front view of the display screen or portion thereof with thetransitional graphical user interface, illustrating a third imagethereof.

FIG. 4 is a front view of the display screen or portion thereof with thetransitional graphical user interface, illustrating a fourth imagethereof.

FIG. 5 is a front view of the display screen or portion thereof with thetransitional graphical user interface, illustrating a fifth imagethereof.

FIG. 6 is a front view of the display screen or portion thereof with thetransitional graphical user interface, illustrating a sixth imagethereof.

FIG. 7 is a front view of the display screen or portion thereof with thetransitional graphical user interface, illustrating a seventh imagethereof.

FIG. 8 is a front view of the display screen or portion thereof with thetransitional graphical user interface, illustrating an eighth imagethereof.

FIG. 9 is a front view of the display screen or portion thereof with thetransitional graphical user interface, illustrating a ninth imagethereof.

FIG. 10 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a tenth imagethereof.

FIG. 11 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating an eleventhimage thereof.

FIG. 12 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a twelfth imagethereof.

FIG. 13 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a thirteenthimage thereof.

FIG. 14 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a fourteenthimage thereof.

FIG. 15 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a fifteenthimage thereof.

FIG. 16 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a sixteenthimage thereof.

FIG. 17 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a seventeenthimage thereof.

FIG. 18 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating an eighteenthimage thereof.

FIG. 19 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a nineteenthimage thereof.

FIG. 20 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a twentiethimage thereof.

FIG. 21 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a twenty firstimage thereof.

FIG. 22 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a twenty secondimage thereof.

FIG. 23 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a twenty thirdimage thereof.

FIG. 24 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a twenty fourthimage thereof.

FIG. 25 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a twenty fifthimage thereof.

FIG. 26 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a twenty sixthimage thereof.

FIG. 27 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a twenty seventhimage thereof.

FIG. 28 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a twenty eighthimage thereof.

FIG. 29 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a twenty ninthimage thereof.

FIG. 30 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a thirtiethimage thereof.

FIG. 31 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a thirty firstimage thereof.

FIG. 32 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a thirty secondimage thereof.

FIG. 33 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a thirty thirdimage thereof.

FIG. 34 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a thirty fourthimage thereof.

FIG. 35 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a thirty fifthimage thereof.

FIG. 36 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a thirty sixthimage thereof; and,

FIG. 37 is a front view of the display screen or portion thereof withthe transitional graphical user interface, illustrating a thirty seventhimage thereof.

The appearance of the transitional image sequentially transitionsbetween the images shown in FIGS. 1-37. The process or period in whichone image transitions to another image forms no part of the claimeddesign.

The broken line showing of the display screen and the remainder of thegraphical user interface forms no part of the claimed design.

Subject matter shown in broken lines is environmental and forms no partof the claimed design. However, Applicants reserve the right to claimany combination or subset of subject matter, whether shown in brokenlines or solid lines, in this application or in one or more divisionalapplications thereof.

CLAIM The ornamental design for a display screen or portion thereof witha transitional graphical user interface, as shown and described.